Friction draft rigging



May 29, 1923.

J. F. O'CONNOR FRICTION DRAFT ,RIGGING 2 Sheets-Sheet l Filed Feb. 16, 1920 May 29, 1923.

1 ,456,993 J. F. OCONNOR FRICTION DRAFT RlGGING Filed-Feb. 16, 1920 .2 Sheets-Sheet 2 lllln. l

llllllllllllllllllllll Illlllllllllllllllllll Zdllhhh lllll Patented May 29, 1923.

warren: stares ker ferrite-i5 JOHN F. oconnoraor cnrcneo, framers, Jessie-non TO WILLIAM 1-12; a umna, on

' CHAZY, new 2031:. Y L

FRICTION DRAFT *nfeerlve.

Application filed February 16, 1920. Serial No. 358,991.

To all-whom it may concern:

Be it known that I, JOHN F. OCoNNoR, a citizen of theUnited States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement 1n Friction Draft Riggings, of Which the following is a full,

clear, concise, and exact description, reference being: had to the accompanying drawn'1gs,f0rm1ng a part of this spec fication.

This invention relates to improvements in friction draft 'riggings.

The object of the invention is to provide a friction draft rigging having very high combined frictional and spring capacity.

Other objects of the invention will more sponding substantially to the line 33 of" Figure 2. Figure 4 is a detail perspective of one of the wedge elements employed with .my improvements. Figure 5 is an elevational view of one of the plates secured to the sills. And Figure 6 is an elevational viewof one of the combinedyokeacting and friction members.

Insaid drawing, 10'10 denote channel shaped center or draft sills of a railway car spaced the usual distance apart andto the outer faces of which are preferably secured fiat reinforcing plates 111l. A portion of. aidrawbar is indicated at 12, the same being operatively acting means by ashort transverse key 18, the latter being adapted to-be inserted through suitable slots 14 1 in the sills 10 and plates 11. r

The improved mechanism broadly,'the following parts, that is, two yoke-acting members A-A, two series of wedge elements B-B on opposite sides of the center line, two series of laterally eX tending'springs: C-O on the outer sides of the sills, two series ofbolts D, and stationfor-ming apart ofthis associatedwith the yoke I includes,

ary sills.

plates on the inner sides 0f the Each of the heavyplates E is fitted against the inner face of the corresponding 1 draft Slll 10 and has a series of outwardly extending rectangular lugs 15%15seated'in corresponding slots 1616 provided in the draft sill and plate 11. The lugs 15 fit the slots 16 so that the heavy plates Eare pre vented from longitudinal-movement. Each heavy plate E is provided with an upper longitudinally extending flat friction slur-f face 17 and with a corresponding lower similar friction surface 18 as indicated most clearly in Figure 5. Intermediate theu pper and lower friction surfaces 17 and ,18, each plate E is" provided with inwardly extended heavy bosses 19-19 and 202'(),

thelatter being at the endsandhaving' faces212l. The

sloping or inclined end intermediate heavy lugs 19 are of rectangular formation.

There are preferably three Wedge ele' ments BB on each side ofthe center line and each of said wedge elements 13 is formed with oppositely inclined friction wedge surfaces 22' and 23 facing toward the corresponding center sill. At its center, vertically, each its outerside with a laterally extended rectangular lug 2% adapted to entera corresponding rectangular opening" 25 provided in the adjacent plate E. The openings 25 andlugs 24 are made such thajt the wedge i elements B are confined to movement transversely 0f the sills and are prevented from longitudinal movement with a respect thereto.

element B is provided on Each wedge element B isprovided with i a; central longitudinally extending tion 26 toaccommodate a bolt D. The-in ner face. 0f5each elementis recessed as in-'- dicated at 27 to accommodate a nut- 28 screwed on the inner end of the corresponding bolt D. Theouter end of each bolt D is provided with a corresponding nut -29 and washer 30, the corresponding spring C being mounted on the bolt between the washer 30 and the outer'side of the draft sill or plate'll.

perfora- Each yoke-acting member A provided at its forward end'with an extension- 31 slotted'as indicated at 32 to accommodate the'key 13 so that said members AQA move in unison with the drawbar in bothflbujfl and draft. Rearwardly of the extensions 31,- the members A are provided with l'aterally inwardly extended shoulders 33 against which the inner end of the drawbar is adapted to bear in bufhng movements. Rearwardly of the shoulder 33. each member A is provided with upper and lower series of opposed inclined surfaces 122 an 123 adapted to cooperate with the respective inclined wedge faces 22 and 23 of the elements B. Each member A is cut away so as to provide a plurality of rectangular pockets 34 34 so that the member A slides over the lugs 19 and 20 of the corresponding plate E. Each member A is further provided on its outer side with flat friction surfaces 35 adapted to cooperate with the friction surfaces 17 and 18 of the corresponding plate E. At each end, on the outer side, each member A is provided with inclined shoulders 36 and 37 which are normally spaced from the inclined faces 21 of the plate and which are adapted to' contact with the latter to limit the movements of the members A'in both buff and draft, as will be understood from an inspection of Figure 2.

The operation is as follows: Assuming an inward or buffing movement of the drawbar, both members A will be forced rearwardly by the drawbar. As the members A travel rearwardly, the friction wedge elements B will be forced laterally inwardly toward each other and toward the center line of the draft rigging, friction being generated between the sets of friction surfaces 22 and 122. Said lateral inward movement of the elements 13 will be yieldingly resisted. by the springs C. In addition to the friction thus generated, friction will also be generated between the surfaces 35 ,of the members A and the surfaces 1'7 and 18 of the plates It is evident that the same action will obtain in draft as in buff except that the cooperating sets of inclined friction surfaces 23 and 123 will come into action instead of the surf-aces 22 and 122. It will be noted also that, in the operation of the device, the lateral pressure on the draft sills is equalized from the outside and the inside so that there is no tendency to buckle or bend the center sills resulting from the lateral movement of the Wedge elements B.

With the construction shown, it is evident that I may utilize all of the usual space allotted between the draft sills for the friction elements and the springs can be disposed outside of the sills in space that is not now generally otherwise used. It is also evident that the number of wedge elements B may bevaried to obtain the desired capacity and various other changes and modifications may be made without departing from the spirit of the invention.

I claim:

1. In a friction draft rigging, the combination with draft sills and a drawbar; of a laterally movable element, having a pair of oppositely extended wedge faces, said element. being located between the draft sills; a spring disposed on the outer side of one of the draft sills to yieldingly resist lateral movement of said element; a heavy friction plate mounted on the inner side of said draft sill, on the outer side of which said spring is disposed, and a member longitudinally movable in both direc tions from its normal position and located between said element and said friction plate, said member being provided on one side with a pair of oppositely extending wedge surfaces cooperable with the wedge faces of said element for effecting lateral movement of the latter in both buff and draft, and on the other side with a friction face co-operating with said friction plate.

2. In a friction draft rigging, the combination with draft sills; of opposed transversely movable elements on the inner sides of the sills, said elements being adapted to move toward each other upon actuation of the draft rigging and each having a pair of oppositely extending wedge faces; members longitudinally movable in both directions each having a pair of oppositely extending wedge faces cooperable with those of said elements to effect the lateral movement of the latter; and springs located outside the sills adapted to yieldingly resist said lateral movement of said elements.

8. In a friction draft rigging, the combination with draft sills, of a series of independent wedge elements on the inner side of each draft sill, the wedge elements of one series being laterally movable relatively toward those of the other series upon actuation of the draft rigging; a laterally extending spring on the outside of the sill and a connecting bolt associated independently with each of said wedge elements; and a pair of longitudinally movable members having wedge faces cooper-able with said wedge elements. I

1. In a railwaydraft rigging, the combination with draft sills having heavy plates affixed to the inner sides thereof; of later- V ally movable wedge elements disposed within the sills, said wedge elements having outwardly extended lugs slidably mounted in corresponding openings spring means .yieldingly resisting lateral movement of said wedge elements; and longitudinally movable members interposed between said wedge elements and said plates,

said members having wedge faces cooper- 1 able with the wedge elements and friction surfaces cooperable with said plates.

5. In a railway draft rigging, the combination with draft sills; of heavy plates disposed on the inner faces of said sills and; held against longitudinal movement, said in said plates;

plates having friction surfaces on their inner sides; of longitudinally movable yokeacting members having outer friction surfaces cooperable with said friction surfaces of the plates, said members having a plurality of opposed sets of inclined wedge faces on their inner sides; a series of laterally movable wedge elements slidably mounted in said plates and having Wedge faces cooperable with those of said members; and spring means disposed outside of the sills for yieldingly resisting lateral movement of said wedge elements.

6. In a railway draft rigging, the combination with draft sills; of heavy friction plates mounted on the innersides thereof and provided with friction surfaces on their inner faces extending parallel to the sills; of a pair of yoke-acting members adapted to be operatively associated with the drawbar, said members being each provided on its inner face with a series of opposed sets of wedge faces and on its outerside with a friction face cooperable with the corresponding heavy friction plate; a series of wedge elements associated with each of said yokeacting members; and spring means for independently resisting lateral movement of said wedge elements. I

7. In a railway draft rigging, the combination with draft sills; of plates disposed on the inner faces of said sills and held against longitudinal movement, said plates having 'a series of laterally extending openings on the inner side, said wedge faces beingv cooperable with the wedge elements.

8. In a railway draft rigging, the combieach of said members having outer day of Feb. 1920'.

nation with draft sills; of stationary friction elements secured to the innersides of said draft sills; longitudinally movable friction elements cooperable with said stationary friction elements and adapted to be moved longitudinally upon actuation of the drawbar; a spring resistance disposed onthe outer side of .each draft sill; a stationary abutment on the outer side of each draft sill and supported by the latter and against which the inner end of the corresponding" spring resistance bears; and means, includmg a movable abutment on the. outer end. of each spring resistance, arranged to compress thev spring resistances laterally inward toward the draft sills upon movement of said longitudinally. movable friction elements.

9. Ina friction draft rigging,- the combination with draft sills and a draw-bar; of a laterally movable element having a pair'of oppositely extended longitudinally arranged wedge faces, each of said faces extending transversely from edge to edge of-said element, said element beinglocated between the draft sills; a spring disposed on the outer sist lateral movement of said element and a '75 side of one of the draft sills to yieldingly remember movable longitudinally in both di I rections from its normal position, and located between said element and saiddraft sill on the outer'side of which said spring is so i" disposed, said member being provided on one 7 side with a flat friction face and'onithe op-I. posite side with a pair of oppositelyextending wedge surfaces co-operatin with the,

wedge faces of said element for e ecting la era-l movement of the latter in both buff and 7 draft, each wedgeface of said member being co-extensive in width with the co-acting face of said element, and extending transversely from edge toedge of said member.

In witness that, I' claim the, foregoingl v have hereunto subscribed my name this 7th l/Vitness: v a I CARRIE GAILING.

JOHN F. ocoNNoitY 

